Found on a Radio Electronics this 80's circuit uses two common SCRs driving lamps. This setting appears elsewhere in this site and this section.
This window comparator circuit was found in a Popular Electronics from the 90s. The circuit has a...
Found in Radio Electronics from the 90s, this siren finds many variations on this site. The...
This circuit with automatic gain control was found in the July 1988 issue of Radio Electronics magazine....